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Part 5 – Reverse Engineering Tools Basics

Reverse Engineering & Malware Analysis Training. Swapnil Pathak. Part 5 – Reverse Engineering Tools Basics. www.SecurityXploded.com. Disclaimer.

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Part 5 – Reverse Engineering Tools Basics

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  1. Reverse Engineering & Malware Analysis Training Swapnil Pathak Part 5 – Reverse Engineering Tools Basics www.SecurityXploded.com

  2. Disclaimer • The Content, Demonstration, Source Code and Programs presented here is "AS IS" without any warranty or conditions of any kind. Also the views/ideas/knowledge expressed here are solely of the trainer’s only and nothing to do with the company or the organization in which the trainer is currently working. • However in no circumstances neither the trainer nor SecurityXploded is responsible for any damage or loss caused due to use or misuse of the information presented here. www.SecurityXploded.com

  3. Acknowledgement • Special thanks to null & Garage4Hackers community for their extended support and cooperation. • Thanks to all the Trainers who have devoted their precious time and countless hours to make it happen. www.SecurityXploded.com

  4. Reversing & Malware Analysis Training • This presentation is part of our Reverse Engineering & Malware Analysis Training program. Currently it is delivered only during our local meet for FREE of cost. • For complete details of this course, visit our Security Training page. www.SecurityXploded.com

  5. Who am I • SwapnilPathak • Member SecurityXploded • Security Researcher • RE, Malware Analysis, Network Security • Email: swapnilpathak101@gmail.com www.SecurityXploded.com

  6. Presentation Outline • PE Tools • PE Editor • Disassemblers • IDA Pro • Debuggers • OllyDbg • Other Useful Tools www.SecurityXploded.com

  7. PE Tools • Portable Executable Editor • Allow user to view, edit data structures present in PE file format • Some Common Use Cases: • Change entry point of the executable • View Import/Export/Sections within EXE • Change characteristics of a file i.e. Dll to Exe • Fix anomalies of PE files • PE editors • Hiew, PE Editor, CFF Explorer, StudPE, LordPE etc www.SecurityXploded.com

  8. PE Editor www.SecurityXploded.com

  9. IDA Pro • Popular commercial software used for Reverse Engineering. • Disassembler and Debugger in one tool • Supports variety of executable formats for different processors and OS • Provides both Text & Graphical view of the code flow. • View strings, Imports, Exports referenced in the executable • Support Plugins • Some of the useful plugins • X86 emulator • IDAPython • IDARub • IDA Scripts • Windbg www.SecurityXploded.com

  10. IDA Pro Functions • IDA Windows & purpose – IDA View, Hex View, Imports, Strings, Functions windows etc. • Graphs & Text view (use “space” to switch between views) • Xref To & Xref From – powerful feature • Jump & Search • Edit function names (N), Add comments (;) www.SecurityXploded.com

  11. IDA Pro in Action www.SecurityXploded.com

  12. Ollydbg • Most Popular Ring 3 Debugger used in Reversing • Provides the below mentioned functionalities • Debugging program step by step (Single Stepping) • Software, Hardware and Memory based Breakpoints • Examine the current state of the program wrt variables, memory etc. • Change the flow or state of Program by directly editing Instructions, Registers or Memory. • Support Plugins, Here are popular ones, • OllyDump • OllyAdvanced • OllyScript www.SecurityXploded.com

  13. Ollydbg Cont. • Different Windows – CPU, Registers, Dump, Stack screens • Trace Into, Trace Over, Exceptions • Integrate windows API help file in ollydbg • Shortcuts (imp. Only) • F7 – Step into [call] • F8 – Single step [execute call] • F9 – Run • F2 – Breakpoint www.SecurityXploded.com

  14. Ollydbg in Action www.SecurityXploded.com

  15. UPX Unpacking Ollyscript Here is example for Unpacking UPX based Malwares using OllyScript in OllyDbg varhwdBP // Local variable to store hardware breakpoint varsoftBP // Local variable to strore software breakpoint sti // Step into F7 command findopeip, #61# // find next POPAD movhwdBP, $RESULT // Store $RESULT to hardware breakpoint local variable bphwshwdBP, "x“ // Set hardware breakpoint (execute) on the next POPAD run // Run F9 command findopeip, #E9????????# // Find the next JMP movsoftBP, $RESULT // Store $RESULT to software breakpoint local variable bpsoftBP run // Run to JMP instruction sti // Step into the OEP cmteip, "<<>>" msg "OEP found, you can dump the file starting from this address" ret Source : http://x9090.blogspot.in/2009/07/ollyscript-tutorial-unpack-upx.html www.SecurityXploded.com

  16. Useful Tools • Packer Identifier Tools • RDG packer detector • PEID • ExeScan www.SecurityXploded.com

  17. PEiD – PE Packer Identifier Tool www.SecurityXploded.com

  18. Reference • Complete Reference Guide for Reversing & Malware Analysis Training www.SecurityXploded.com

  19. Thank You ! www.SecurityXploded.com

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